springboot动态配置定时任务时间

springboot 动态配置定时任务时间

• 需要实现 SchedulingConfigurer 接口
• 类上添加启动定时任务注解 @EnableScheduling
• 添加 @Component 注册为 bean

例子如下

import org.apache.commons.lang3.StringUtils;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.annotation.SchedulingConfigurer;
import org.springframework.scheduling.config.ScheduledTaskRegistrar;
import org.springframework.scheduling.support.CronTrigger;
import org.springframework.stereotype.Component;
import java.text.SimpleDateFormat;
import java.util.Date;

@Component
@EnableScheduling
public class SchedulerJobs implements SchedulingConfigurer {

   private final org.slf4j.Logger logger = LoggerFactory.getLogger(this.getClass());

   @Value("${server.scheduler.cron}")
   private String cron;
   @Autowired
   private Service Service;

   @Override
   public void configureTasks(ScheduledTaskRegistrar taskRegistrar) {

       taskRegistrar.addTriggerTask(() -> {
           // 需要实现的任务逻辑
           service.doWork();
           
           logger.info("定时任务： " + "时间：【{}】",
                   new SimpleDateFormat("yyyy-MM-dd hh:mm:ss").format(new Date()));
       }, triggerContext -> {
           //任务触发，可修改任务的执行周期
           CronTrigger trigger = new CronTrigger(getCron());
           Date nextExec = trigger.nextExecutionTime(triggerContext);
           return nextExec;
       });
   }

   private String getCron() {
       if (StringUtils.isBlank(cron)) {
           cron = "0 0 * * * *";
       }
       return cron;
   }
}

配置文件application.properties

server.scheduler.cron=0 0 * * * *